Sionver Boll was a doctor who appeared in two episodes of the TV series The Clone Wars involving the Zillo Beast. Actress Cara Pikko provided Boll’s voice in “The Zillo Beast” and “The Zillo Beast Strikes Back”.
Boll was a Bivall, as was Okalin who was an advisor to the king of Onderon in several other episodes of The Clone Wars. Boll created the bomb that created a sinkhole from where the Zillo Beast emerged. Boll was quite empathic towards the Zillo Beast and tried to convince Sheev Palpatine that the creature could be sentient and should be spared.
You can see Sionver Boll in this clip from The Clone Wars.
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